Flying With a Baby

The one safety call that matters most

Airlines let children under two fly free on a parent's lap, but free is not the same as safe. The FAA states that the safest place for a child under the age of two is in an approved child restraint system or device, not in your lap, because your arms cannot hold a child securely during unexpected turbulence. The AAP agrees: a baby is safest in their own assigned, ticketed seat with a car seat that is labeled for aircraft use.

If buying a seat is not possible this trip, you can still fly as a lap family. Just know what you are trading, and keep your baby buckled to you with the airline's belly loop only when the crew instructs. The rest of this guide assumes you may do either.

Best age and timing to fly

There is no legal minimum set by the FAA, but the AAP suggests waiting until your baby is about 2 to 3 months old when you can, and notes it is generally safe to fly once a newborn is at least 7 days old. Crowded airports and cabins raise a young baby's chance of catching something, so delaying a few weeks gives the immune system a head start.

For timing within the day, book around your baby's longest predictable sleep stretch if one exists, and avoid the tightest possible connection. A 90-minute layover that becomes 40 minutes after a delay is miserable with a stroller, a car seat, and a diaper bag. Give yourself buffer.

Flight-day do and avoid

Quick calls for a calmer day in the air.

Moment	Do	Avoid
Booking	Buy a seat and bring an aircraft-approved car seat when possible	Assuming a lap seat is just as safe
Security	Tell the officer you have milk or formula; remove it for separate screening	Pouring out breast milk or formula to meet the 3-1-1 rule
Boarding	Gate-check the stroller and car seat at the jet bridge if not using the seat onboard	Carrying bulky gear down a narrow aisle
Takeoff	Feed, nurse, or offer a pacifier as the plane climbs	Letting a baby cry through the climb without sucking
Cruise	Change diapers on the lavatory fold-down table	Changing a diaper on your tray or seat
Landing	Start a feed or pacifier again on the initial descent	Waiting until ears already hurt

Lap baby vs. buying a seat

A car seat on a plane only works if it is certified for it. Look on the seat for a label that reads "This restraint is certified for use in motor vehicles and aircraft." A seat with that label installs with the aircraft lap belt, must go in a window seat, cannot sit in an exit row, and must not block anyone's path to the aisle in an emergency.

If your child is older and past a harness, the CARES harness is the only FAA-approved harness-type device for aircraft. It is certified for children who weigh between 22 and 44 pounds and are up to 40 inches tall, and it packs down to about a pound. Booster seats are not allowed for takeoff and landing on a plane, because they need a lap-and-shoulder belt that aircraft seats do not have.

Gate-checking the stroller and car seat

Most US airlines let you check a stroller and car seat for free, usually right at the jet bridge. Confirm the exact policy with your carrier, then:

• Tag both items at the gate before boarding; staff hand you tags or attach them.
• Fold the stroller and roll it to the aircraft door, where it is taken planeside.
• Carry the car seat onboard if you bought a seat; otherwise gate-check it too.
• Use a padded travel bag for the car seat to cut wear and gate damage.
• Pick both up at the jet bridge on arrival, or at baggage claim if it is a longer connection.

TSA with baby items

Formula, breast milk, toddler drinks, and baby and toddler food, including puree pouches, are exempt from the 3.4-ounce liquids limit and do not need to fit in a quart bag. To move through faster:

• Tell the officer at the start of screening that you are carrying these items.
• Take milk, formula, and pouches out of your bag so they can be screened separately.
• Bring ice packs, freezer packs, or gel packs to keep milk cold; these are allowed to cool milk even if partly melted.
• Expect that some items may be tested; you do not have to open or taste them, though an officer may ask for additional, non-invasive screening.
• Strollers, car seats, and carriers go through the X-ray, or get a visual inspection if they are too big.

Ear pain on takeoff and landing

Babies cannot pop their own ears on purpose, so the pressure change during climb and descent can hurt. Sucking and swallowing open the eustachian tubes and equalize the pressure. The AAP advises having babies drink from the breast or a bottle or suck on a pacifier during takeoff and landing to ease discomfort. Mayo Clinic adds that timing a feed so your baby is hungry during these windows helps.

Descent is usually worse than climb, and it can start 30 to 40 minutes before landing. Have a feed or pacifier ready early rather than waiting for the first cry. For an older baby, a sippy cup or a snack to chew works the same way.

Diaper changes and what to pack

Most larger planes have a fold-down changing table in at least one lavatory; ask a flight attendant which one. Change before boarding, once midflight, and after landing as a baseline. Pack a small wet bag for soiled clothes and a couple of disposable changing pads.

For everything else, double your normal day's supplies. A reasonable carry-on holds about a dozen diapers, a full pack of wipes, two changes of clothes for the baby and one for you, more feeds than you expect to need, a light blanket, and two or three quiet toys. Keep one full feed and a few diapers in a small pouch you can reach without opening the big bag.

Reflects FAA flying-with-children guidance, AAP HealthyChildren, TSA screening rules, and Mayo Clinic, 2024-2026.

Related questions

Do babies fly free?

On most US airlines a child under two can fly free as a lap baby on domestic flights, though international tickets often charge about 10 percent of the adult fare plus taxes. Free covers the fare, not a seat. The FAA and AAP recommend buying a seat and using an aircraft-approved car seat, which is the only way to guarantee you can use one.

Can I bring a car seat and stroller for free?

Most US airlines let you check one stroller and one car seat free, usually planeside at the gate, in addition to your baggage allowance. Policies vary, so confirm with your carrier. A padded travel bag protects the car seat from handling damage.

How much milk or formula can I bring through security?

As much as you reasonably need for the trip. Formula, breast milk, toddler drinks, and baby food are exempt from the 3.4-ounce liquids limit. Tell the TSA officer, take these items out of your bag for separate screening, and bring ice or gel packs to keep them cold.

How do I keep my baby's ears from hurting on the plane?

Have your baby suck and swallow during takeoff and the initial descent by nursing, offering a bottle, or giving a pacifier. Swallowing opens the eustachian tubes and equalizes pressure. Start on descent early, since it can begin well before landing.

Where do I change a diaper on a plane?

Most larger aircraft have a fold-down changing table in at least one lavatory; ask a flight attendant which one has it. Change before boarding and after landing too, and carry a wet bag for soiled clothes since lavatory space is tight.

Sources & further reading

1. FAA — Child Safety: Keep Your Little One Safe When You Fly
2. AAP HealthyChildren — Flying With Baby: Parent FAQs
3. TSA — Is Breast Milk, Formula and Juice Exempt From the 3-1-1 Liquids Rule?
4. TSA — Traveling With Children
5. Mayo Clinic — Airplane Ear: Symptoms & Causes

This article reflects current AAP, CDC, FDA, and other public-health guidance and is for educational purposes only. It does not constitute medical advice. ParentFlow is a wellness companion — not a substitute for your pediatrician. For any medical concern, contact your healthcare provider.